The i-mate Ultimate 6150 smartphone has XGA (1024 x 768 pixels) video output and a USB port. So, in theory, you could plug an ordinary LCD desktop screen and keyboard in to provide a desktop computer replacement. The smartphone would not be as powerful as a regular computer, but might be adequate for web browsing and online applications. One thing which was not clear to me from the specifications, was exactly what video connector was provided and what you could plug into the USB socket on the phone. Could you plug a USB hub and plug a keyboard and mouse into that?
The phone has a XScale PXA 270 520MHz Processor. This is similar to that used in some thin client computers. If you did not want a phone, or portability, a thin client computer would be cheaper.